KR100860879B1 - RF Tag had a function of displaying freshness of foods - Google Patents

Abstract

The present invention relates to an RF tag having a freshness display function, wherein the freshness of the food is determined in real time from the change in distribution time for each temperature of the food in circulation, with reference to the freshness determination reference information, and the freshness information of the determined food is determined. It is implemented to display in real time, so that the user can know the freshness of the food anytime, anywhere.

RF Tag, Food, Freshness

Description

RF tag had a function of displaying freshness of foods}

1 is a structural diagram according to an embodiment of an RF tag with a freshness display function according to the present invention

Figure 2 is a block diagram according to an embodiment of the IC chip of the RF tag with a freshness display function according to the present invention

3 is a diagram illustrating an example of freshness determination reference information according to temperature and distribution time;

4 is a diagram illustrating an example of an evaluation index for determining freshness;

5 is a flowchart illustrating an operation of displaying freshness information of an RF tag having a freshness displaying function according to the present invention.

<Explanation of symbols for the main parts of the drawings>

100: RF tag 110: display sheet

120: sensor 130: timer

140: IC chip 141: storage unit

142: food storage information generation unit 143: freshness determination unit

150: antenna

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an RF tag having a freshness display function, and more particularly, to a technology for determining and displaying freshness of food.

In the related art, the expiration date is printed on the food package or the bar code is marked on the food package, and thus information on the expiration date can be known. However, since there was no way of knowing how much food was stored at what temperature in the distribution process, there was a problem that the consumer did not know whether the food was fresh when purchasing a temperature sensitive food.

In recent years, with the development of communication technology, an RF tag of an attachment type capable of recording and communicating information has been commercialized, and is increasingly used. The present inventor uses the RF tag to determine the freshness of the food, and by visually displaying the determined freshness information for the RF tag with a freshness display function that allows the user to easily grasp the degree of freshness of the food in circulation anytime, anywhere. I did research.

The present invention has been invented under the above-described object, and an object thereof is to provide an RF tag having a freshness display function capable of determining the freshness of food and visually displaying the determined freshness information.

According to an aspect of the present invention for achieving the above object, the RF tag with a freshness display function according to the present invention with respect to the corresponding food from the change in distribution time for each food temperature of the food in circulation with reference to the freshness determination reference information The freshness is determined in real time, and the freshness information of the determined food is displayed in real time.

Therefore, the present invention has the advantage that the user can easily grasp the degree of freshness of the food in circulation anytime, anywhere by determining the freshness of the food in circulation and displaying in real time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

In general, an RF tag includes an IC chip that stores and processes information, an antenna that emits information stored on or processed by the IC chip, and a paper that wraps the IC chip and the antenna so that it is not exposed to the outside. The case body is made of a material, and an adhesive layer is formed on one side of the case body, and the adhesive layer is attached to an object to attach an RF tag. Information on the object is stored in the IC chip of the RF tag, the information is radiated by an antenna, and the information is scanned and read by an RF tag reader.

1 is a structural diagram according to an embodiment of an RF tag with a freshness display function according to the present invention. The RF tag 100 having the freshness display function according to the present invention changes the structure and function of the conventional RF tag to determine the freshness of the food in circulation in real time, and displays the determined freshness information of the food. Anytime, anywhere to know the freshness of the food to ensure reliability.

Specifically, the RF tag 100 having the freshness display function according to the present invention includes a display sheet 110, a sensor 120, a timer 130, an IC chip 140, and an antenna 150. It is made to include. In the drawing, reference numeral 160 denotes a case body that protects the sensor 120, the timer 130, the IC chip 140, and the antenna 150 from being exposed to the outside together with the display sheet 110. Although not shown in the figure, an adhesive layer is formed at the bottom thereof, and the adhesive layer is adhered to a food package or the like to attach an RF tag.

The display sheet 110 is made of a material such as paper on which various information is printed, and includes an electronic paper display panel 110a for displaying freshness information of food. The electronic paper display panel 110a may be configured to display different colors according to the freshness of the food. For example, the freshness of food is blue for 'very good', sky blue for 'good', green for 'normal', yellow for 'danger', red for 'very dangerous', etc. I can display it. The electronic paper display panel 110a may be manufactured by the inventions described in Published Patent Nos. 2006-112379 (2006.11.01) and Published Patents 2006-123959 (2006.12.05), and thus, a detailed description thereof will be omitted. Let's do it.

The sensor 120 is a part for detecting a temperature, for example, may be a temperature sensor. The temperature information detected by the sensor 120 is transmitted to the IC chip 140. The timer 130 is a part for counting the distribution time of the food by counting the time from the moment the food is produced and distributed. The time information counted by the timer 130 is transmitted to the IC chip 140.

The IC chip 140 is a part for determining the freshness of the food to be distributed with reference to the freshness determination reference information, as shown in FIG. 2, the storage unit 141, the food storage information generation unit 142, and The freshness determination unit 143 is included. Figure 2 is a block diagram according to an embodiment of the IC chip of the RF tag with a freshness display function according to the present invention.

The storage unit 141 stores the food storage information described later, and freshness determination reference information as shown in FIG. 3 is a diagram illustrating an example of freshness determination reference information according to temperature and distribution time, and a specific score is given to each internal temperature range, and specific for each internal temperature range whenever the distribution time exceeds 10 minutes. It can be seen that the weight of.

The food storage information generation unit 142 generates the food storage information by real-time monitoring the change in distribution time for each temperature of the food from the information detected by the sensor 120 and the timer 130, and the food storage information The storage unit 141 stores in real time. The food storage information stores information such as a food name, a food distribution start time, and a change in distribution time for each temperature of the food.

The freshness determination unit 143 refers to the freshness determination reference information stored in the storage unit 141, and corresponds to a change in distribution time for each temperature of the food included in the food storage information stored in the storage unit 141 in real time. The freshness of the food is determined in real time, and the freshness information of the determined food is displayed in real time through the display sheet 110.

For example, the freshness determination unit 143 reads the food storage information stored in real time in the storage unit 141 and analyzes the change in distribution time for each temperature of the food included in the food storage information to determine the freshness as shown in FIG. 3. The score is calculated with reference to the reference information, the freshness of the food is determined in real time according to the calculated score as shown in FIG. 4, and the freshness information of the determined food is displayed in real time through the display sheet 110. Process.

4 is a diagram illustrating an example of an evaluation index for determining freshness, when the calculated score is less than 100, the freshness of the food is very good, and when the calculated score is 100 or more and 199 or less, the freshness of the food is shown. Good, if the calculated score is 200 or more and 299 or less, the freshness of the food is normal; if the calculated score is 300 or more and 499 or less, the freshness of the food is dangerous; if the calculated score is 500 or more, the freshness of the food Illustrates the decision to determine that is very dangerous.

For example, suppose the tables shown in FIGS. 3 and 4 are for 'milk'. If the milk is stored and distributed for 7 hours at 5 ° C., 20 minutes at 12 ° C., and 30 minutes at 20 ° C., the score calculated by the freshness determination reference information shown in FIG. 3 is as follows. The score calculated at 5 ° C is '1 point + 1.1 × 6 × 7 point (weight) = 44.56 point', and the point calculated at 12 ° C is '2 point + 1.5 × 2 point (weight) = 5 point'. The score calculated at 20 ° C becomes '4 points + 2 x 3 points (weighted values) = 10 points', and the total total score is 59.56 points. Since this score is less than 100 in FIG. 4, it is determined that the milk in circulation is very good.

The antenna 150 radiates food storage information stored in the storage unit 141. That is, the antenna 150 radiates the food storage information stored in the storage unit 141 to scan and read the food storage information through an RF tag reader (not shown).

Accordingly, the RF tag 100 having the freshness display function according to the present invention generates food storage information by real-time monitoring the change in distribution time for each food temperature from the information detected by the sensor 120 and the timer 130. The food storage information is generated through the unit 142 and stored in the storage unit 141 in real time, and is stored in the storage unit 141 in real time with reference to the freshness determination reference information through the freshness determination unit 143. By determining the freshness of the food in real time from the change in distribution time for each temperature of the food included in the food storage information, and by displaying the determined freshness information of the food in real time through the display sheet 110, the user at any time anywhere The freshness of can be grasped.

On the other hand, according to an additional aspect of the present invention, the freshness determination unit 143 may be implemented to give a weight when determining the freshness when it is determined that the food is stored for a certain time or more in a specific temperature range. In this case, it is preferable that the freshness determination unit 143 is configured to give more weight as the temperature is higher or lower than the reference temperature.

That is, in the case of food, the freshness is further reduced as long as it is stored at room temperature for a long time or stored at too low temperature for a long time, and thus is weighted for rational freshness evaluation. For example, the temperature and the temperature shown in FIG. Looking at the freshness determination standard information for each food according to the distribution time, it can be seen that when the distribution time exceeds 10 minutes, a specific weight is given to each internal temperature band, and the temperature is higher than the reference temperature (4 to 11 ° C.). It can be seen that the higher or lower is the more weighted.

The operation of displaying the freshness information of the RF tag 100 having the freshness display function according to the present invention having the above configuration will be briefly described with reference to FIG. 5. 5 is a flowchart illustrating an operation of displaying freshness information of an RF tag having a freshness displaying function according to the present invention.

When the food begins to be distributed in the state in which the RF tag 100 having the freshness display function according to the present invention is attached to the packaging of the food, the food storage information generation unit 142 first starts the sensor 120 and the timer in step S110. The food storage information is generated by monitoring the change in distribution time for each temperature of the corresponding food from the information detected by the 130 and stored in the storage unit 141.

Next, in step S120, the freshness determination unit 143 determines the freshness of the food in real time from the change in distribution time for each temperature of the food included in the food storage information stored in step S110, with reference to the freshness determination reference information. . When the freshness of the food is determined in step S120, the freshness information of the food determined in step S130 is displayed on the display sheet 110 in real time.

Accordingly, the RF tag with the freshness display function according to the present invention determines the freshness of the food in circulation and displays the freshness of the food anytime and anywhere by real-time display, thereby achieving the above object of the present invention. You can do it.

As described above, the RF tag having the freshness display function according to the present invention refers to the freshness determination reference information, and determines the freshness of the food in real time from the change in distribution time for each food temperature in circulation, and determines the determined food. By displaying the freshness information in real time, the user can grasp the freshness of the food anytime, anywhere, and has a useful effect of safe distribution and purchase of food.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it is apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the following claims from this description. .

Claims (4)

A display sheet displaying freshness information of the food; A sensor for detecting a temperature; A timer for detecting time; A storage unit for storing food storage information and freshness determination reference information, and real-time monitoring of change in distribution time for each food temperature from the information detected by the sensor and the timer to generate food storage information, and storing the food storage information From the food storage information generation unit for storing in real time in the storage unit and the freshness determination reference information stored in the storage unit, the corresponding food from the change in distribution time for each temperature of the food included in the food storage information stored in the storage unit in real time An IC chip including a freshness determination unit configured to determine freshness of the fish in real time and to display the determined freshness information of the food in real time through the display sheet; An antenna for radiating food storage information stored in the storage unit; RF tag with a freshness display function, characterized in that it comprises. The method of claim 1, The display sheet is: An RF tag with a freshness display function characterized by displaying different colors according to the freshness of the food. The method according to claim 1 or 2, The freshness determination unit: When it is determined that the food has been stored for a certain time or more at a specific temperature range, the RF tag having a freshness display function characterized in that the weight is given when determining the freshness. The method of claim 3, wherein The freshness determination unit: An RF tag with a freshness display function characterized by being given more weight as the temperature is higher or lower than the reference temperature.

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